FRONDEL, CLINFFORD <br/><br/>
THE SYSTEM OF MINERALOGY  SILICA MINERALS 

 - 7 
 - NEW YORK-U.S.A.  JOHN WILEY AND SONS  1962 
 - 334 pag  24 cm 
 - 0  3 .
<br/><br/>QUARTZ-TRIDYMITE/OPAL-CRISTABALITE 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CIENCIAS PURAS
<br/><br/><label>Dewey Class. No.: </label>549  / F84